Multiple Choice- A-level Chemistry
Exam
With answers
Which statement describes the trends of electronegativity values in the Periodic Table?
Increase across a period and increase down a group.
B Increase across a period and decrease down a group.
C Decrease across a period and increase down a group.
D Decrease across a period and decrease down a group - answer-B
Which statement explains why ammonia, NH3, is a gas at room temperature and pressure?
A The bonds between the nitrogen and hydrogen atoms in ammonia are weak.
B Nitrogen and hydrogen have very low boiling points.
C The bonds between the ammonia molecules are weak.
D Ammonia is covalently bonded - answer-C
Which statement correctly describes the boiling points of fluoroethane and iodoethane?
Fluoroethane has a higher boiling point because it forms hydrogen bonds.
B Fluoroethane has a higher boiling point because the C-F bond is stronger than C-I.
C Iodoethane has the higher boiling point because it forms the stronger instantaneous dipole-
induced dipole bonds.
D Iodoethane has the higher boiling point because the C-I bond is less polar than C-F. - answer-
C
Which compound could be formed by a one-step reaction from 1-chloropropane?
A CH3CHOHCH3
B CH3CHNHCH3
C CH3CH2CH2OH
D (CH3)2CHNH2 - answer-C
A chemist wants to accurately determine the aspirin content of an aspirin tablet. Which of the
following techniques should the chemist use?
A thin layer chromatography
B melting point determination
C addition of a neutral solution of iron(III) chloride
D titration with sodium hydroxide solution - answer-D
The reaction below occurs in the manufacture of iodine. Cl2 + 2NaI 2NaCl + I2 Which of the
following statements about this reaction is correct?
, Iodine is oxidised by chlorine.
B Chloride is reduced.
C Iodide ions lose electrons.
D Chlorine is a weaker oxidising agent than iodide. - answer-C
In a test on some liquid fuels, decane is completely burnt in air. 2C10H22 + 31O2 20CO2 +
22H2O What mass of oxygen would combine with 1 mol of decane?
A 15.5 g
B 248 g
C 496 g
D 672 - answer-C
What volume of 0.250 mol dm-3 sodium hydroxide solution should be diluted to 1000 cm3 to
make a 0.0100 mol dm-3 solution?
A 40 cm3
B 50 cm3
C 80 cm3
D 160 cm3 - answer-A
A student carries out a titration. Sodium hydroxide solution is transferred to a conical flask using
a pipette. Methyl orange indicator is added to the flask. Hydrochloric acid is added from a
burette until the indicator changes colour. Which of the following would lead to the titre being
larger than it should be?
Rinsing the conical flask with water before adding the sodium hydroxide solution.
B Rinsing the burette with water before filling it with hydrochloric acid.
C Rinsing the pipette with water before filling it with sodium hydroxide solution.
D Adding extra drops of indicator. - answer-B
Approximate values of the equilibrium constant for the Haber process reaction are given in the
table.
N2 + 3H2 ⇌ 2NH3
Temperature/K Kc
298 10^4
1100 10^-8
(a) Which of the following statements about this reaction is correct?
At 298 K the equilibrium position is towards the reactants.
B There will be no temperature between 298 and 1100 where Kc = 1. C As the temperature is
raised, more ammonia is formed.
D At 1100 K the position of equilibrium lies to the left
Exam
With answers
Which statement describes the trends of electronegativity values in the Periodic Table?
Increase across a period and increase down a group.
B Increase across a period and decrease down a group.
C Decrease across a period and increase down a group.
D Decrease across a period and decrease down a group - answer-B
Which statement explains why ammonia, NH3, is a gas at room temperature and pressure?
A The bonds between the nitrogen and hydrogen atoms in ammonia are weak.
B Nitrogen and hydrogen have very low boiling points.
C The bonds between the ammonia molecules are weak.
D Ammonia is covalently bonded - answer-C
Which statement correctly describes the boiling points of fluoroethane and iodoethane?
Fluoroethane has a higher boiling point because it forms hydrogen bonds.
B Fluoroethane has a higher boiling point because the C-F bond is stronger than C-I.
C Iodoethane has the higher boiling point because it forms the stronger instantaneous dipole-
induced dipole bonds.
D Iodoethane has the higher boiling point because the C-I bond is less polar than C-F. - answer-
C
Which compound could be formed by a one-step reaction from 1-chloropropane?
A CH3CHOHCH3
B CH3CHNHCH3
C CH3CH2CH2OH
D (CH3)2CHNH2 - answer-C
A chemist wants to accurately determine the aspirin content of an aspirin tablet. Which of the
following techniques should the chemist use?
A thin layer chromatography
B melting point determination
C addition of a neutral solution of iron(III) chloride
D titration with sodium hydroxide solution - answer-D
The reaction below occurs in the manufacture of iodine. Cl2 + 2NaI 2NaCl + I2 Which of the
following statements about this reaction is correct?
, Iodine is oxidised by chlorine.
B Chloride is reduced.
C Iodide ions lose electrons.
D Chlorine is a weaker oxidising agent than iodide. - answer-C
In a test on some liquid fuels, decane is completely burnt in air. 2C10H22 + 31O2 20CO2 +
22H2O What mass of oxygen would combine with 1 mol of decane?
A 15.5 g
B 248 g
C 496 g
D 672 - answer-C
What volume of 0.250 mol dm-3 sodium hydroxide solution should be diluted to 1000 cm3 to
make a 0.0100 mol dm-3 solution?
A 40 cm3
B 50 cm3
C 80 cm3
D 160 cm3 - answer-A
A student carries out a titration. Sodium hydroxide solution is transferred to a conical flask using
a pipette. Methyl orange indicator is added to the flask. Hydrochloric acid is added from a
burette until the indicator changes colour. Which of the following would lead to the titre being
larger than it should be?
Rinsing the conical flask with water before adding the sodium hydroxide solution.
B Rinsing the burette with water before filling it with hydrochloric acid.
C Rinsing the pipette with water before filling it with sodium hydroxide solution.
D Adding extra drops of indicator. - answer-B
Approximate values of the equilibrium constant for the Haber process reaction are given in the
table.
N2 + 3H2 ⇌ 2NH3
Temperature/K Kc
298 10^4
1100 10^-8
(a) Which of the following statements about this reaction is correct?
At 298 K the equilibrium position is towards the reactants.
B There will be no temperature between 298 and 1100 where Kc = 1. C As the temperature is
raised, more ammonia is formed.
D At 1100 K the position of equilibrium lies to the left
